DIRECT READING GUN SIGHT ADJUSTMENT

• US 3,826,012 A
• Filed: 12/28/1971
• Issued: 07/30/1974
• Est. Priority Date: 12/28/1971
• Status: Expired due to Term

• Current Assignee: Frank A. Pachmayr, Nanitta G. Pachmayr
• Original Assignee: Frank A. Pachmayr
• Inventors: Pachmayr, Frank A.
• Primary Examiner(s): Prince, Louis R.
• Assistant Examiner(s): Stephan, Steven L.
• Application Number:
  US05/212,929
• Time in Patent Office: 945 Days
• Field of Search: 33/247,248,246,254,252,257,258,259,260,255,256,241,242,243,249,233 42/15 116/133
• US Class Current: 42/122
• CPC Class Codes: F41G 1/26 screw
• CPC Class Codes: F41G 1/38 Telescopic sights specially adapted for smallarms or ordnance telescopic sights in general G02B; Supports or mountings therefor
• CPC Class Codes: G02B 23/14 Viewfinders for photographic apparatus G03B13/02
• CPC Class Codes: G02B 27/32 Fiducial marks and measuring scales within the optical system

Abstract

A gun sight which is adjustable to introduce a variable '"'"''"'"'elevation'"'"''"'"' correction into the sighting of a target, and which has a scale or scales reading directly in terms of the proper gun to target distance for any particular setting of the sight.

Claims

1. In a gun sight structure including telescopic sighting means having an adjustable sight element which is movable in a predetermined direction to introduce a variable elevation correction into the sighting of a target, a rotary adjusting part mounted to be turned about a predetermined axis and operable upon rotation to move said element to a series of different elevation settings, and a second part near said rotary adjusting part and which does not turn therewith;

the improvement comprising a plurality of scale members, means for detachably connecting said scale members selectively and interchangeably to one of said parts at a location to coact with index means associated with the other part in indicating elevation, different caliber markings on said different scale members respectively indicating different caliber bullets for which said members respectively are to be used, a plurality of essentially arcuate scales formed on each of said scale members and each reading directly in terms of proper gun to target distances for which said rotary part is adjusted in different settings thereof, said scales of each scale member being staggered circularly about said axis in a relation giving gun to target distance readings for bullets of different weights respectively but all of the same particular caliber identified by the one of said caliber markings which is on that particular scale member, and additional marking means on each of said scale members indicating said different bullet weights for which each of said scales is to be used.

2. The improvement as recited in claim 1, in which said connecting means are constructed to attach each of said scale members to said one of said parts in a relation enabling initial sighting-in adjustment of the scale members about said axis relative to said one part, with ultimate retention in a desired adjusted position.

3. The improvement as recited in claim 1, in which said scale members are essentially circular to extend essentially circularly about said axis in use.

4. The improvement as recited in claim 1, in which said scale members are essentially circular and have portions interfitting with said one part in arcuate projection and groove relation, said scale members being circularly discontinuous and resiliently distortable radially of said axis in a relation moving said interfitting portions into and out of interfitting relation to attach an individual one of said scale members to or detach it from said one part.

5. The Improvement as recited in claim 1, including an essentially circular carrier disposed about said rotary adjusting part for attaching one of said scale members to said second part, said carrier and said second part having interfitting essentially arcuate shoulders mounting said carrier to said second part for relative adjusting movement and frictional retention in a desired adjusted position, said carrier being circularly discontinuous and resiliently radially distortable to a condition in which it is separable from said second part.

6. The improvement as recited in claim 5, in which said carrier has an irregularized external surface exposed for contact by a users fingers in turning the carrier relative to said second part.

7. The improvement as recited in claim 1, in which said second part has a tubular portion with external threads and an internal arcuate shoulder, there being an adapter having a reduced diameter portion with internal threads engaging said external threads of said tubular portion of said second part, said adapter having an enlarged diameter portion, there being a carrier member disposed about said rotary part and received within said enlarged diameter portion of said adapter and rotatably adjustable relative thereto and having an arcuate flange engaging said arcuate shoulder of said second part, said carrier being adapted to carry one of said scale members in a position of extension about said rotary part, said carrier being circularly discontinuous and resiliently radially constrictable to a condition allowing removal thereof from said tubular portion of said second part.

8. The improvement as recited in claim 7, in which said carrier has an irregularized external surface beyond said enlarged diameter portion of said adapter exposed for manual actuation, said enlarged diameter portion of said adapter having external threads, and there being a dust cover connected to said external threads and enclosing said rotary part.

9. The improvement as recited in claim 1, in which said second part has a tubular portion disposed about said rotary part and having external threads, there being an adapter having a reduced diameter internally threaded portion engaging said external threads of said second part, said adapter having a larger diameter portion within which said scale members are detachably and interchangeably mountable by said connecting means.

10. The improvement as recited in claim 9, in which said connecting means include an essentially circular but circularly discontinuous carrier to which said scale members are connectable and which is resiliently constrictable to a reduced diameter condition for attachment to and separation from said second part and adapter.

11. The improvement as recited in claim 1, in which said scale members are essentially circular and circularly discontinuous and resiliently radially constrictable to conditions enabling attachment to and detachment from said one part, said discontinuous essentially circular members having tabs at their opposite ends for constricting said members radially.

12. In a gun sight structure including an adjustable sight element which is movable in a predetermined direction to introduce a variable elevation correction into the sighting a target, a movable adjusting part operable to actuate said element to a series of different elevation settings, and a second part near said adjusting part and which does not move therewith;

the improvement comprising a plurality of scale members, means for detachably connecting said scale members selectively and interchangeably to one of said parts at a location to coact with index means associated with the other part in indicating elevation, different scales formed on said different scale members respectively and each reading directly in terms of proper gun to target distances for which said adjusting part is set in different positions thereof, said scales of the different members being calibrated to give gun to target distance readings for different types of aMmunition, and markings on said scale members indicating said different types of ammunition with which the different scale members are used.